Why Pray? ( Luke 18 v 1 )

I know a man he gets up every day at 5.30 to pray,he also talks to God during the day,and has a time of prayer in the evening,why?,that's a good question.I wonder, if you do pray, why do you pray?.Well this man says he always prays because it is important,for the Christian life is about relationship. He sees God as his loving heavenly Father and loves to talk to him,no better person to talk to,than the one who loves and cares for him the most. He says he loves Him so very much. He seeks to be honest to God his Father,no secrets,no hidden agendas, he knows that God his Father is watching over him every moment of the day.Of course God is a triune God , Father,Son, and Holy Spirit,but he says when you are talking to one,you are talking to all.Much of his talking to God is in interceding for others he says that's very important,for he believes that prayer makes a big difference.He believes God answers prayer,and that nothing is to small or insignificant to pray about,I asked him why he gets up so early to pray,well he said,if he didn't it's more than likely ,it would not happen as other things,other pressures would encroach upon it,and that he would not like that,for prayer is vital to his relationship with God,and his walk with God.He went on to quote a few verses of a hymn,'Prayer is the burden  of a sigh,the falling of a tear,the upward glancing of an eye, when none but God is near.Prayer is the Christians vital breath,the Christians native air; his watchword at the the gates of death, he enters heaven with prayer'.